[Haskell-cafe] Bug with [Double]

[Ben Millwood]

On Wed, May 19, 2010 at 10:57 AM, Serguey Zefirov <sergueyz at gmail.com> wrote:
>
> PS
> Rationals:
> Prelude> [1,1+2/3..10] :: [Rational]
> [1 % 1,5 % 3,7 % 3,3 % 1,11 % 3,13 % 3,5 % 1,17 % 3,19 % 3,7 % 1,23 %
> 3,25 % 3,9 % 1,29 % 3,31 % 3]
>
> Same result.

This sounds like a bug to me. The section of the Haskell Report that
deals with the Enum class mentions Float and Double, not Rational, and
there's really no sensible reason why Rationals would exhibit this
behaviour given that they don't have rounding error.